A couple days ago, My Laptop (HP dv6-6c65se) fan started alternating between no noise (but still working) and high noise (as if the fan is hitting a metal) every few minutes. I tried cleaning the dust but the same noise remained. After doing some research, I found that I might need to oil (or lubricate) the fan.
The issue is that I can't open the place where I can put the oil. Here is a picture of my fan:
(I removed the sticker but I can't open under it)
How to solve this issue?
Fan Model: AD505HX-EEB